NPIHD800 & NPIHD800R – Earth Fault Directional and Overcurrent Relay
Products family : Feeder Protection, Current Protection
Sector : Industry
NPIHD800 & NPIHD800R provide the earth fault overcurrent protection for medium and high voltage electrical networks. These multi-function and directional relays supervise phase to earth short-circuits and the good operating of the circuit breaker and its trip circuits.
NPIHD800R (R2 case) is dedicated to the refurbishment of 7000 series (R2 case) of CEE.
Two mountings are available, Flush Rear Connection (EDPAR) or Projecting Rear Connection (SDPAR). A blank cover R1, provide in option, can improve mechanical installation (replacement of CEE case R3 by a NPIHD800R).
As well as the usual protection functions, NP800 relays provide monitoring, measurement and recording of the electrical quantities of the network.
Setting, reading, measurement and recording are all available locally or remotely.
ANSI codes
50N – Instantaneous earth fault overcurrent
50NBF – Breaker failure with earth fault overcurrent
51N – Earth fault overcurrent
67N – Earth directional overcurrent
74TC – Trip circuit supervision of the breaker
86 – Latching of the output contacts
Logical selectivity